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Chainsaw engines are traditionally either a two-stroke single-cylinder gasoline (petrol) internal combustion engine (usually with a cylinder volume of 30 to 120 cm 3) or an electric motor driven by a battery or electric power cord. In a petrol chainsaw, fuel is generally supplied to the engine by a carburetor at the intake.
Most chainsaw safety features are focused on the kickback problem, and seek to either avoid it (chain and bar design), or to reduce the risk of injury should it occur (chain brakes). In addition to the safety features built into the chainsaw, operators should also wear specific chainsaw safety clothing. Most older saws have few or none of these ...
In the Lumberjack World Championship, a one cylinder engine chainsaw is used to make three cuts, first down, then up in a white pine log. The chainsaws are off before the time starts, and cannot be self-starting or simple start engines. The record was set by Dave Bolstad of New Zealand in 2007 with a time of 5.55 seconds. [10]
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Rendezvous’s next chainsaw throwing competition starts on 7 February (Damien Gabet) I kept my finery on the next day for Rendezvous’s chainsaw throwing competition. Ahead of me in the line was ...
Dieseling or engine run-on is a condition that can occur in spark-plug-ignited, gasoline-powered internal combustion engines, whereby the engine keeps running for a short period after being turned off, drawing fuel through the carburetor, into the engine and igniting it without a spark.
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Kickback is when the running chainsaw jumps up unexpectedly out of the cut, thus endangering the saw operator. Helmet protection can only be successful if the chain brake has been operated to stop the saw chain, since a chain running at full speed can easily cut into the helmet. The helmet, and its eye protection guard, also protect against ...